Money could be at the heart of the delay in Lewis Hamilton’s re-signing with the McLaren team.

Until now, the British team has indicated it wants the 2008 world champion to stay on board, while 27-year-old Hamilton insists he has no plans to leave and will turn his attention to the 2013 contract soon.

But according to Blick newspaper, McLaren is pushing to cut Hamilton’s existing contract retainer “in half” to “about EUR 10 million”.

The Swiss report said the driver is unimpressed with the negotiations so far, but at least Hamilton’s mood has improved tenfold compared with his calamitous 2011.

It is a full year since Hamilton raged about his “frickin ridiculous” track rivals in the 2011 Monaco grand prix, when he also half-seriously suggested that the stewards were targeting him “because I’m black”.

He is back on top form this season, but still yet to win a race, arguably mainly due to McLaren’s numerous team mistakes.

Reports have suggested boss Martin Whitmarsh, who insists Hamilton “deserves” to win this weekend in Monaco, is worried the mistakes might drive the highly rated racer away.

On Wednesday, however, Hamilton denied he is frustrated.

“I’m not, no. This is the way racing goes sometimes,” he insisted.

“I could easily get frustrated because I could have a healthy lead in the championship — but that’s not the case.

“I don’t want to speak too early but something has definitely changed. Whatever I’m doing is working,” he told British reporters.

“In life, things just seem a lot better and that’s enabling me to get on with my job without having any baggage.”

Marussia needs a KERS system to catch up with its direct rivals.

That is the admission of team boss John Booth, who told the Russian website championat.com that he is looking into adding the energy recovery technology to next year’s Marussia package.

“First of all, I want to say that while it is said it (KERS) is a ‘green’ technology, in reality it’s just a serious waste of money,” he said.

“But in our situation it’s time to start thinking seriously about KERS. Of the gap to Caterham, five or six tenths is due to KERS,” added Booth.

“So we are thinking seriously about it for 2013, but so far there is no decision.”

Both admitted the start of the 2012 season has been a disappointment so far for Marussia, which in its first two years was called Virgin.

He said the team has recently completed a phase of serious restructuring.

“We had a good team of people before, but now we have a good team of designers. Though we have been in F1 for three years, I have the feeling that we were actually born in July 2011.”

Both is undoubtedly referring to the split mid last year with former technical chief Nick Wirth, and the relocation to a new headquarters.

Last Sunday proved that Pastor Maldonado is no mere ‘pay driver’.

“If he was a fool, he would not be with us, no matter how much money he brings,” Sir Frank Williams is quoted by Brazil’s Globo Esporte.

Venezuelan Maldonado, whose links to the state owned oil company PDVSA and president Hugo Chavez controversially deliver many millions to Williams’ Oxfordshire based team, became F1′s fifth different winner of 2012 last weekend in Spain.

It has helped him to shake off the ‘pay driver’ insult, Williams insisting he is now a potential world champion instead.

“Without a doubt. He is very fast and makes no mistakes,” the newly 70-year-old Briton said.

Williams does, however, acknowledge that Maldonado’s money was a key factor in the decision to sign him.

“Yes, it was to some extent,” he said. “I don’t deny that. But he’s also a real driver. He fully deserves to be on the team, with or without money.

“The truth is that if you don’t have money, you don’t get to be in formula one,” added Williams.

Team shareholder Toto Wolff agrees: “If you want to race in GP2, you need a few million pounds. So, the drivers need not only to be fast and talented, but able to attract the sponsors.

“So let’s forget this thing about ‘pay drivers’,” he insisted.

Triple world champion Nelson Piquet, however, has some lingering doubts.

He ran Maldonado in his own GP2 team some years ago, and this week recalled a driver who was often “too aggressive” and made too many mistakes.

“We’re not talking about a guy who shone in his youth, like Nico Rosberg,” said the famous Brazilian, “or someone like Lewis Hamilton, who always had everything he needed thanks to Ron Dennis.

“In GP2, when you don’t stand out in your second year, you begin to be doubted. In Maldonado’s case, he only shone in his fourth year.

“Perhaps because of this he only made it to formula one as a paying driver, without having anything special, apparently. He was perceived as just a good pilot, but clearly no Alonso.

“Now he was at the right place at the right time but he still managed to beat Alonso in Spain as well as another world champion, Kimi (Raikkonen). So hats off to him.”

Jerome d’Ambrosio is the latest name linked with struggling Felipe Massa’s Ferrari race seat.

While Mark Webber or Sergio Perez are the Maranello team’s more likely longer term solutions, Ferrari may be looking simply for a stop-gap solution, having reportedly run out of patience for Brazilian Massa’s lack of pace and results.

The French sports daily L’Equipe named d’Ambrosio, the Belgian driver who lost his Virgin/Marussia seat at the end of last season.

He is managed by Eric Boullier, and now Lotus’ reserve driver.

Also named as potential substitutes for Massa in recent days were Nico Hulkenberg, Paul di Resta and Kamui Kobayashi.

But, according to L’Equipe, d’Ambrosio “has the advantage of being immediately available, giving Ferrari time to find a more permanent solution” for 2013.

Also ready to step in now is Adrian Sutil, the former Force India driver who is putting his career back together after the Eric Lux assault affair.

“I have no money to offer,” the German is quoted as saying. “After five seasons, people know what is my level. I want a normal salary, that’s all.”

Five races in, F1′s cleverest brains are still yet to decode the mystery of the bizarre and fascinating 2012 season.

As was the case when he utterly dominated last year, Sebastian Vettel is still leading the drivers’ points chase.

But, before last weekend, if he had been told that Williams’ Pastor Maldonado would be the winner of the Spanish grand prix, the German admitted: “Well, I would have put a lot of money on them!

“I think the odds weren’t bad,” he smiled.

Indeed, the major British bookmaker William Hill was taking bets at 500-1 prior to the Barcelona weekend.

A spokesman confirmed that only two bets at 10 pounds or above were placed on Maldonado prior to qualifying.

“I’m sure Williams don’t understand why they just won the race here,” McLaren’s Jenson Button is quoted by the Guardian newspaper.

But the previously-derided ‘pay driver’ Maldonado is not the only potential new winner in 2012, after Jenson Button, Fernando Alonso, Nico Rosberg and Vettel won the opening four grands prix.

A detailed look at F1′s specialist reporting in the past few weeks shows that Lewis Hamilton, Mark Webber, Kimi Raikkonen, Romain Grosjean, Michael Schumacher, Sergio Perez and Kamui Kobayashi are all also widely regarded as genuine victory candidates in 2012.

And given that their teammates have won grands prix this season, even the struggling Felipe Massa and Bruno Senna should be added to that list.

“Dammit, let’s go for (HRT’s) Karthikeyan!” wrote Chris Hockley in the Sun newspaper.

“It’s really quite crazy right now,” Vettel, who despite his young age would count himself among F1′s currently perplexed purists, told Germany’s Auto Motor und Sport.

“What’s happening is difficult for us to explain,” he added.

The situation has split the F1 audience, with the purists shaking their heads, and others marvelling at the unprecedented spectacle.

“The spectacle has taken over the sport,” said the Paris daily Le Figaro.

“Even the teams can’t be sure who will be the hare and who will be the tortoise at any given track,” wrote Hockley.

Alonso, who is the joint championship leader, is in the purists’ camp.

“Of course it is attractive for the spectators that we are going to Monaco not knowing if we will fight for victory or be left out of the points,” he is quoted by El Pais.

“But in a way, after eleven years in formula one and now I’m at Ferrari, I would like to have more stability,” the Spaniard admitted.

Sir Jackie Stewart said: “What’s going on is unbelievable, which I think is the outcome of the new rules, new tyres — I think it’s many factors,” he told the Spanish sports daily AS.

“What’s happening,” said Maldonado’s race engineer Xevi Pujolar, “is that these tyres are allowing teams who do not have the biggest budgets to be eligible for really good results.

“The reason is that the most important thing now is to have a good setup and also some luck with the temperature.”

Pirelli, F1′s tyre maker, has received both criticism and praise for its huge role.

“Pirelli have been both bold and brave,” Sun journalist Hockley said. “It can’t be easy for a manufacturer to make tyres that sometimes wear out faster than you can say Mercedes.”

Marco Tronchetti Provera, the Italian marque’s company chief, is unapologetic.

“What we have provided is what the teams have asked for, and it was not easy,” Italian language reports quote him saying. “Our engineers have done an extraordinary thing.”

Former F1 driver Mika Salo believes his Finnish countryman Valtteri Bottas is being groomed by Williams for a race seat — in 2012.

When the Toto Wolff-managed Bottas, 22, was announced as the British team’s 2012 reserve, Sir Frank Williams said he would practice on 15 Friday mornings and then “most likely” be replaced with a “more experienced driver” for the rest of those race weekends.

That more experienced driver would ultimately turn out to be Bruno Senna.

So with Brazilian Senna struggling so far in 2012, Salo has revealed he senses things could be about to change.

“Bottas is incredibly respected by the team,” Salo, now a commentator for the Finnish broadcaster MTV3, said.

“When I spoke with Frank Williams, he praised Valtteri to the skies, and said that he belongs in the races.

“I asked him when and he said it wouldn’t be long.

“Yes, I read between the lines that he means this season,” added Salo.

One major spanner in the works, however, is that Senna brings crucial sponsorship to Williams.

“It is a difficult situation for Williams, where both drivers bring money,” Salo acknowledged.

“But the good thing is that Frank Williams is not a businessman first, he is an old racing driver. He thinks about nothing else but how to make his team successful.

“Although Senna is a nice guy, he is not able to drive at the level that he needs to be at.”

When asked about Salo’s theory, Bottas commented: “I have no information.”

Top teams McLaren and Red Bull have questioned whether F1 should have tested last week.

Since the sport clamped down hard on private testing for cost reasons some years ago, there remained many in the paddock – notably Ferrari – who argued that at least some in-season testing should still take place.

So, for 2012, it was agreed that Mugello would host a three-day session in between the Bahrain and Spanish grands prix.

Every team except HRT attended.

But there were rumblings that not everyone was happy. McLaren, in fact, did not even send its race drivers Jenson Button and Lewis Hamilton to Tuscany.

Then, on Friday in Spain, the British team’s regular duo was busily testing in official practice, fielding extravagant sensors and experimental components.

“We would have had a very similar programme whether we went to Mugello or not,” said sporting director Sam Michael.

“All the teams are geared up to not have testing, to not having test teams and that means we’re equipped and do our planning to do all of that work on Friday.

“I think the (Mugello) test itself, personally, I think you could do without it,” Michael continued. “I think it’s a lot of energy and expense during the season that we probably don’t need.

“Of course McLaren will gain a lot out of that test but formula one is all relative, so all we really did was spend a load of money.”

Red Bull’s technical boss Adrian Newey agreed.

“I think we learnt the pasta in Italy is still the best in the world and that’s about it really,” he said when asked about the Mugello test.

“I’d agree with what Sam says. To me, yes you go to the test because it’s available. We all spent money but the value of in-season testing has to be questionable.”

F1 needs to resolve its dispute with Mercedes before the sport’s multi-billion dollar floatation plans can go ahead.

That is the warning of the German team’s chief executive Nick Fry, as Mercedes refuses to sign up to the new Concorde Agreement because rival top teams Ferrari, McLaren and Red Bull have been offered better deals.

Fry is quoted by The Times newspaper as admitting that the progress of talks with Bernie Ecclestone are “not as strong as I would like”.

But he warned: “If CVC wish to float F1, I think they need this resolved fairly quickly — possibly more than we need it resolved.”

At the same time, he played down speculation Mercedes is on the verge of quitting F1.

“The mindset is absolutely in capital letters: Mercedes-Benz wishes to be in F1,” Fry insisted. “I would add that F1 also needs Mercedes-Benz.

“I am completely convinced in my mind that if CVC wish to sell some or all of F1, the value they can derive from that would be severely diminished if Mercedes was not a participant.”

But a senior executive of Mercedes denied the spat is about money.

“It is about fairness,” the unnamed official told The Times’ Kevin Eason.

“We are facing a situation in which three teams will between them decide some of the biggest issues in formula one. That cannot be right.”

Narain Karthikeyan is not guaranteed his HRT seat for the whole of the 2012 season.

Following what the reporter referred to as a ‘chat’ with the Indian driver, the Times of India claimed Karthikeyan is “a million euros” short of a contract that will see him definitely race through November’s Brazil finale.

The 35-year-old also began the 2011 season for the struggling Spanish team, but was replaced by the Red Bull-funded Daniel Ricciardo mid-season.

The Times of India said securing the extra million in sponsorship is proving “difficult” for Karthikeyan.

“Sponsors are happy to give him money but not to the team, as obviously they do not want to be associated with a struggling outfit,” the report said.

The good news for Karthikeyan, according to the journalist Harish Samtani, is that his sponsorship deal with Tata brings to HRT the Williams gearbox, valued at about EUR 5 million.

The report said the link between Karthikeyan and Williams is the British team’s joint venture with Jaguar, which is owned by the driver’s sponsor Tata.

Montreal has been warned to spend around $15 million on the Circuit Gilles Villeneuve or risk losing the Canadian grand prix.

La Presse reports that Bernie Ecclestone has said only a major redevelopment of the circuit will lead to talks about a new contract beyond 2014.

The report said that, in light of the F1 chief executive’s warning, Montreal mayor Gerald Tremblay has appealed to higher levels of government for the necessary money.

“Negotiations are underway between the three levels of government and the bodies of formula one”, the report said.

Race promoter Francois Dumontier told RDS: “It’s premature to talk about this.

“There are still two years to go on the current contract. We have started talking, but that it’s out now I find excessive. Honestly, I don’t know where it’s come from.”

He added: “Given that the permanent installations of the circuit, including the control tower and the garages, are nearly 25 years old, it is likely that their repair is an important element in the negotiations for an extension to the current agreement.

“But it seems to me to be premature to talk specific sums.”

F1 figures have mixed feelings after this week’s Mugello test.

Amid speculation the Ferrari owned circuit would like a spot on the race calendar, it emerged that the famous Maranello based team pushed hard for the Tuscan facility to host the first in-season test in many years.

“It’s very beautiful and the food is very good,” said Red Bull team boss Christian Horner, “but we are spending a lot of money and honestly we didn’t feel the need to come here.”

Indeed, the only circuits comparable to high speed Mugello on the F1 calendar are Monza, Spa and parts of Silverstone.

And testing at Barcelona prior to next weekend’s Spanish grand prix would have made infinitely more logistical sense.

Lotus team boss Eric Boullier said Mugello was “money spent needlessly”.

Of course, those in the Ferrari camp thought differently.

“I would do more tests during the season,” said Fernando Alonso. “One lap here is worth 100 at other places, without considering that one day here is worth a year’s work on the simulator”.

But Mark Webber said Mugello is too fast for a decent test circuit, but he was among those who enjoyed the layout.

And the Australian couldn’t understand McLaren’s opposition, which extended to both Lewis Hamilton and Jenson Button giving up their running to test drivers.

“It was an absolute no-brainer for (Sebastian Vettel and I) to be here,” said the Red Bull driver.

“Mileage is so limited these days that it’s good for me to be in the car. Any chance we get to drive the car in the real world, we’ll do it,” added Webber.

Tuesday was a new experience for many F1 regulars; a rare in-season test on an unfamiliar track.

Some teams wanted the three-day session to take place at Barcelona, saving money ahead of the Spanish grand prix at the same venue, but Ferrari pushed hard – reportedly even waiving the circuit rental fees – for its circuit in Tuscany to get the nod.

The day did not start well weather-wise, but the spectators – reportedly 25,000, and visibly more than in Bahrain last weekend – came nonetheless.

“This is my first time here,” Sebastian Vettel, whose teammate Mark Webber kicked off proceedings for Red Bull on Tuesday, told Auto Motor und Sport.

Australian Webber, second fastest after the first morning behind crowd favourite Fernando Alonso, has been here before.

“I once did a sports car race here,” he said.

“It’s a bit too fast (for F1).”

Indeed, of the grand prix circuits, only Monza is faster. Nico Rosberg, in the Mercedes, gave Mugello a big thumbs up.

“1 to 10, I’d give it 8.5,” the German grinned.

It is an important test for Ferrari, but – contrary to earlier rumours – there is no ‘B’ car.

Alonso told La Gazzetta dello Sport that Mugello and then Barcelona next weekend will not make or break Ferrari’s championship.

“We need to catch up race after race,” said the Spaniard. “If we do poorly in Barcelona, it doesn’t mean our season is over.”

Lucas di Grassi has admitted that even his continuing role at Pirelli is not a ticket back onto the F1 grid.

“I’m in the best possible position technically, as the driver with knowledge of the tyres – almost choosing them for next season – it puts me in a very comfortable position.

“Of course I want to race again with a team and I’m working on it,” said the 2010 Virgin driver, who was replaced by the now Marussia team with Jerome d’Ambrosio at the end of his only season in F1.

“The only problem is the lack of sponsorship,” di Grassi is quoted by Globo. “Let’s hope some Brazilian companies want to come in to support.”

Martin Brundle, a former F1 veteran whose son Alex now competes in the lower-tier GP3 series, admitted sponsorship is a problem for aspiring racers.

“Drivers are paying as much as $10 million to be a reserve at some teams,” the British commentator told the Daily Mail.

“Nine men who raced in F1 last year don’t have a drive any more. As soon as the money runs out, they’re replaced by someone who does have money.”

Another theory about Force India’s absence from a practice session in Bahrain last weekend has emerged.

Word has it the Silverstone based team sat out the second session on Friday because staff were spooked by a Molotov cocktail incident and didn’t want to be returning to their hotels in darkness.

Officially, Force India said the decision to skip a practice session was for “logistical reasons”.

“None of the other teams seem to have a problem,” said Bernie Ecclestone last weekend. “Maybe (it’s) nothing to do with being in this country, maybe it’s something else.”

An event summary by Germany’s Auto Motor und Sport said: “There are rumours that Force India wanted to save its engines because they are short on cash.”

The team’s Bahrain crisis was handled by deputy chief Bob Fernley, in the absence of owner and principal Vijay Mallya.

Indeed, Indian Mallya does seem to have bigger problems, with the latest reports indicating he is considering selling 26 per cent of his flagship spirits company in order to rescue his dying airline Kingfisher.

A spokesman for JM Financial, representing Mallya, dismissed the suggestion as “factually incorrect and speculative”.

HRT has announced it will sit out next week’s rare in-season formula one test at Mugello.

For the first time in years, the sport has relaxed slightly its strict testing ban in order to give teams the chance to run between grands prix.

The three-day session at Ferrari’s Italian circuit will begin next Tuesday, during the three-week gap between Bahrain and Spain.

Struggling backmarkers HRT, however, will not be there, opting instead to be “completely focused” on relocating to its new Caja Magica headquarters in Madrid.

Every other team will be at Mugello, 30 kilometres from Florence — the first in-season test for four years.

26 drivers will be in action, as will a lot of update packages following F1′s return from the hectic ‘flyaway’ season.

Red Bull, Ferrari, Mercedes, Sauber, Marussia and Toro Rosso will use their regular race drivers.

Running regular racers and a tester will be Lotus (Jerome d’Ambrosio), Williams (Valtteri Bottas) and Force India (Jules Bianchi).

Germany’s Auto Motor und Sport said Caterham is “using the opportunity to earn some money” by accepting the sponsorship of the Venezuelan Rodolfo Gonzalez.

McLaren has scheduled to run its testers Oliver Turvey and Gary Paffett, although Lewis Hamilton has indicated he might gatecrash the programme in order to help solve the MP4-27′s newfound tyre problems.